I remember I had one of the first of those external rf clipper
processors about 20 years ago... it was called Com-something. They used
an if of about 50 kHz, with LC filters... it worked amazingly well and
was sought after by DXers and contesters.
Larry N8LP
[EMAIL PROTECTED] wrote:
You
A British company called Datong brought out an RF clipper a few years back. It
used active filters to tailor the mic audio then CMOS switches to produce a DSB
signal at 50kHz, diode clip it, and demod it back to audio. They made 3
products
- an upmarket one with switches to select the clip
So I'm not the only one..
What a relief!
73 de Giulio IW3HVB
--
Quote:
On the front panel board while trying to add SSB components after the fact I
managed to slightly burn the edge of a push button. Wish the instructions
had mentioned to put the low SSB components in before the higher
Hi, all concerned:
I have an old Comdel in-mic-line r-f clipper, which uses fewer than 100
discrete parts on a 4X6in board.
What the device does is to heterodyne baseband audio to vlf, put it through
a USB filter, limit it, lowpass-filter it, and heterodyne it to baseband.
Inband distortion
Hi,
I'ld love to know when and if we can expect the transverter for the
70cm band.
Can anyone comment?
vy 73 de toby
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Yes I can confirm it! I got it abt 15 yaers ago and used and had a great
succes in QRP/SSB. I still have it, but now I use just CW and don't use the
clipper now.
Look for this type and you'll have very good results.
Best 72
Alex I0SKK
-Messaggio originale-
Da: [EMAIL PROTECTED]
Ron D'Eau Claire wrote:
I'm inventorying each board as it is begun. ... At this point capacitors
for the RF board are a wild blur. I'm sure I have not correctly identified
at least a third of them. Many numbers on the caps are simply not in the
parts list. If anyone has a good way to ID
G'morning:
K2 #4181 has been sold. Thanks to those who showed an interest
73,
Ken K3IU
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Ken K3IU
Sent: Tuesday, March 01, 2005 7:07 PM
To: 'Elecraft Reflector'
Subject: [Elecraft] FS: K2 4181 FOR SALE
In a message dated 04/03/05 11:00:07 GMT Standard Time, [EMAIL PROTECTED]
writes:
I have an old Comdel in-mic-line r-f clipper, which uses fewer than 100
discrete parts on a 4X6in board.
---
I have one of the Datong D75 RF speech
Yes, that's the one I had and was referring to... it worked great. I
knew it was Com-something ;-) Sounds like there are already a couple of
knockoffs out there.
Larry N8LP
David J Windisch wrote:
Hi, all concerned:
I have an old Comdel in-mic-line r-f clipper, which uses fewer than
100
This is one for Eric to weigh in on, but with proper in/out routing
between transmit and receive, I wonder if it wouldn be possible to come
up with an algorithm to make the KDSP2 work as an rf clipper/filter in
transmit with baseband audio output? Of course, the settling time
between T/R might
ORRY TO HAVE OPENED A BEE'S NEST WITH MY QUEST FOR A TS-850 TYPE SPEECH PROC.
tHE PROC IN THE K2 WOULD BE USEFULL FOR A SMALL AMOUNT OF PRE-COMPRESSION.
ALSO ONE CAN USE AN OP AMP TO MEASURE THE DIFFENCE BETWEEN AVERAGR POWER AND
PEAK POWER.
THIS GIVES US A CONTROL VOLTAGE TO VARY THE
tHE ORIGINAL TS-520 HAD A DX SWITCH. IT WAS A CHEAP AND EASY WAY FOR RF
PROCESSING.
WHEN THE DX SWITCH WAS KICKED IN, A AMPLIFIER BEFORE THE DRIVER INCREASED
GAIN. THE ATTACK AND DELAY OF THE FINAL ALC THEN WOULD USE SHORTER TIME
CONSTANTS.
THE RESULT WAS GREAT
In stead of modifying the well-designed interior of K2,
the clipper can be external. Look at www.qsl.net/df4zs
where a small print is inside the microphone itself.
Having access to + voltage, mic can have a genuine RF-clipper
built inside (AF-filtered SSB-clipper-filtering-prod.det-AF).
Hence,
Instead of modifying the well-designed interior of K2,
the clipper can be external. Look at www.qsl.net/df4zs.
I have 36x27 mm print INSIDE THE MICROPHONE itself.
Of course it is a 10mA miniversion, but a genuine RF-clipper
with two filters,3 ICs and 3 potmeters. Variables are
input, output,
That looks perfect Benny, no matter where you mount it.
Larry N8LP
Benny Aumala wrote:
In stead of modifying the well-designed interior of K2,
the clipper can be external. Look at www.qsl.net/df4zs
where a small print is inside the microphone itself.
Having access to + voltage, mic can
I use the rubber ring from the Yaesu FT-100 fitted over
the K2's knob. It's a tight fit.
I like it ! :-)
Dave KK7SS
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I recently finished my KX-1 and installed the ATU board only to find that my
ouput is only about 0.9 watts on 40 and 0.2 on 20. When I finished the basic
KX-1, I put it on an uncalibrated QRP wattmeter and it read about 2 watts, so I
thought I was in the ballpark. Now, assuming that my
I recently finished my KX-1 and installed the ATU board only to find that my
ouput is only about 0.9 watts on 40 and 0.2 on 20.
I had a similar problem in my recently completed KX1. I solved it by
redoing the step in which you null the voltage reading from the trimmer
cap (step says to set
I'm pleased that the KDSP2 addresses the issues that limit the KSSB2's
performance. And yes, that is a common approach these days; have an
unspectacular
filter close to the antenna, and clean things up at audio with DSP. This
leads me to say two things:
We all know, or at least we
I wonder who makes that station for them.
Stan Rife
W5EWA
Houston, TX
K2 S/N 4216
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Daniel Reynolds
Sent: Thursday, March 03, 2005 11:13 PM
To: George Cortez; elecraft@mailman.qth.net
Subject: Re:
Having had to today off work because of the snow, I had a chance to look at my
KSB2 SSB filter characteristics. My biggest interest was whether the filter had
blow-by and if so, how much.
First I modeled the filter input and output switching networks using 150 ohms
as
the source and filter
Jim,
I am only speaking from my experience and this may be a childish
statement from your point of view, and I am not trying to be smart or
anything like that, but be sure and look at both sides of the capacitors.
Some of them have numbers on both sides. I got in a hurry when doing my
--- Stan Rife [EMAIL PROTECTED] wrote:
I wonder who makes that station for them.
Stan Rife
W5EWA
Houston, TX
K2 S/N 4216
My guess is that it is a contract out of China. I don't think they are
'rebranded' from another manufacturer (although my knowledge of electronics
tools and
Hi o all
This morning I ordered the repair paint from Elecraft. I was not aware
of this nice addition to the parts and mod kits page but thanks to Mick,
M1MDG, I found the solution to my problem (I hope I will need it only
for the light scratch on the bottom cover, Hi). I really believe that my
Hi again,
I just soldered a bit. Changing C7 is not to my satisfaction as it also
increased the tuning range considerably. So C2 or L1 would have to be
adjusted too.
After a more thorough search in the web I found out that changing R4 and R5
on the FPB has the same effect on the RIT range but
Hey John:
I had a similar problem with my KX1. It ended up being a bad solder
joint on a resistor pack. I cannot remember which one, but if you look
at the schematic
you will be able to locate it. After applying a little heat to the joint
all was OK. Hope this helps in some way.
Ken/NO4D
I've run HF mobile since the 1950's and over the years I found
out what works and what dosn't. The worst mobile ant I
ever used was the type with bottom loading coil. It was
the next best thing to a dummy load. Later I tried
the top loaded Hustlers and they were a little better but
not
I've been doing electronics for years and there's some pattern matching
you have to do when sorting out parts. Especially caps and resistor
packs. It's not completely automatic like resistors used to be. (I say
used to be because I could swear the colors were clearer when I was
younger. :) )
I'd
Guys'
Apologise if this is OT...but need help on this one...
Does anyone on the list...have a copy of the Kenpro/Yaesu G600RC Rotator
manual... The 600RC IS NOT the same circuit diagram as the G400 or
G400RC made either by Kenpro or Yaesu...
There are differences in the switches on
Guys'
Apologise if this is OT...but need help on this one...
Does anyone on the list...have a copy of the Kenpro/Yaesu G600RC Rotator
manual... The 600RC IS NOT the same circuit diagram as the G400 or
G400RC made either by Kenpro or Yaesu...
There are differences in the switches on
Hello all
K2 #4785 Has arrived in the UK today
no parts missing..5 days to get here wow.
2 years since i built my K1 #1532 so this should be fun.
Mick m1mgd
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Hello All:
A little levity for weekend. I have been inundated with pornographic spam and
e-mails lately. So, when I saw e-mails regarding Rubber Knobs and Tight
Skirts, I thought the worse. I'm glad it was all some nice clean Amateur Radio
Elecraft traffic.
73, Mark, K7MAS
K2 874
On Fri, 2005-04-03 at 12:55 -0800, Mark Sandler wrote:
A little levity for weekend. I have been inundated with pornographic
spam and e-mails lately. So, when I saw e-mails regarding Rubber
Knobs and Tight Skirts, I thought the worse. I'm glad it was all some
nice clean Amateur Radio
Hello Group,
I've been kinda lurking for a while and haven't seen much about power
supplies.
Is there a 'supply of choice' for the K2? It's needs are modest, and
present no difficulty, but for the 100 watt overshoes - well, that might be
a different story.
While I'm on the subject of
Is it possible to purchase the power amp and tuner, build 'em both in a
single enclosure and operate them from the K2 while leaving the K2 in a pure
QRP state?
See http://home.pacbell.net/johngreb/k2_100_in_ec2.pdf and
http://www.kk7p.com/k2kpa100.html.
73,
Lyle, KK7P
Tom,
There is no 'power supply of choice' that I am aware of except for MY
choice! I don't like the noise potential of switching supplies (but I admit
many are reported as no noise problem). I use a linear supply and keep it
on the floor under the operating table. Transformers can couple into
He did not want a full 100W, and he wanted to not have to swap tops to
convert rig.
There are HF amps 30-40W that are made for the yeasu Ft-817.
Do not be tempted to buy the cheap ad filthy Palomar TX-50. It is a broad
band 3-30mhz
50W out either, unless you can design filters well. I use
I have had success using the Outbacker Outreach antenna with my KX-1. I just
screw it into the ball mount on my pickup truck bed when wanting to operate
portable. Of course, I do not leave the Outbacker there while moving the
vehicle as it is 12 ft tall. It does work better in my application
But he has to operate within the Canadian band plan - right? Just to
make a point - not to whine - I often hear Canadian SSB on top of the
7.070 PSK frequency.
73,
Paul
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You must be a
Any body have experience with the new dual rig control. You can use one rig
for TX THE OTHER FOR RX.
Of course the K2 wins out in the RX dept. In fact it rated up there with the
orion and the $10,000 ICOM
My K2 is for QRP. I AM not going to put in the 100W amp, I will put in the
DSP
On Fri, 2005-04-03 at 16:59 -0800, designer wrote:
But he has to operate within the Canadian band plan - right? Just to
make a point - not to whine - I often hear Canadian SSB on top of the
7.070 PSK frequency.
He has to operate according to Canadian regulations, yes.
Our regulations do not
Tom Skinner wrote:
I've been kinda lurking for a while and haven't seen much about power
supplies.
Is there a 'supply of choice' for the K2? It's needs are modest, and
present no difficulty, but for the 100 watt overshoes - well, that might be
a different story.
The following is my
On Mar 3, 2005, at 7:38 PM, [EMAIL PROTECTED] wrote:
The performance of its filter, and the way that it performs when
installed
in the radio, is DISMAL
On sideband, tight skirts (the electronic kind, gentlemen!) are
terribly
important, maybe more so than on CW. There is nothing
Hi,
I cannot get the initializing led to flicker on my kdsp2. When I do the
voltage checks, I really cannot make sense of it, versus the schematic.
I have double checked that the right parts are installed in the proper
orientation, re-checked for bridges, etc. I have checked that none of
Hello Neal,
I cannot get the initializing led to flicker on my kdsp2.
When I do the voltage checks, I really cannot make sense\
of it, versus the schematic.
Any clues?
Here are a couple of things to try:
1) Turn the K2 on.
2) Be sure the rtc menu item is on, per page 18 of the KDSP2
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